Self-ballasted lamp and lighting equipment

• US 8,500,316 B2
• Filed: 02/25/2011
• Issued: 08/06/2013
• Est. Priority Date: 02/26/2010
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Lighting & Technology Corporation (Toshiba Corporation)
• Inventors: Hisayasu, Takeshi, Ono, Keisuke
• Primary Examiner(s): Le, Tung X
• Application Number:
  US13/034,959
• Publication Number:
  US 20110210664A1
• Time in Patent Office: 893 Days
• Field of Search: 362/226, 362/231, 362/249.02, 362/251, 362/294, 362/547, 362/555, 362/800, 362/806
• US Class Current: 362/547
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

According to one embodiment, a self-ballasted lamp includes a light-emitting module, a base body, a first insulating member, a screw, a second insulating member, a cap and a lighting circuit. The light-emitting module has a light-emitting portion including semiconductor light-emitting elements mounted on a surface of a metallic substrate. The base body is made of metal and the light-emitting module is arranged on one end side of the base body. The first insulating member is interposed between the substrate of the light-emitting module and the base body. The substrate of the light-emitting module is fixed to the base body with the screws. The second insulating member is interposed between the screws and the substrate of the light-emitting module. The cap is provided at the other end side of the base body. The lighting circuit is housed inside the base body.

Claims

1. A self-ballasted lamp comprising:

a base body comprising a first end side comprising a screw attachment portion and a second end side;

a light-emitting module comprising a substrate and a light-emitting portion disposed on a surface of the substrate, the a light-emitting portion comprising a semiconductor light-emitting element mounted thereon, the light-emitting portion comprising a circumferential region;

an insulating member comprising a screw insertion portion and an opening portion through which the light-emitting portion is exposed, the opening portion engaging the circumferential region of the light-emitting portion to position the light-emitting module;

a screw disposed in the screw insertion portion and attached to the screw attachment portion;

a lighting circuit provided at the second end side of the base body; and

a cap provided at the second end side of the base body.

2. The self-ballasted lamp according to claim 1, further comprising a second insulating member interposed between the screw and the substrate of the light-emitting module, the second insulating member comprising a plurality of positioning projecting portions fitting the second insulating member to the substrate at a plurality of locations.

3. The self-ballasted lamp according to claim 1, wherein:

the substrate is made of metal; and

the insulating member is interposed between an end side of the substrate opposite the one end side and the base body.

4. The self-ballasted lamp according to claim 3, wherein the substrate is attached in close face-contact via the first insulating member to a base body attachment face which is attached to the base body.

5. The self-ballasted lamp according to claim 1, further comprising a globe attached to the first end side of the base body and covering the light-emitting module, wherein the insulating member includes a wall portion surrounding a circumference of the light-emitting portion.

6. The self-ballasted lamp according to claim 5, wherein a virtual line connecting an end portion of the light-emitting portion to an upper end of the insulating member which is located opposite from the end does not intersect the screw.

7. The self-ballasted lamp according to claim 1, wherein:

a plurality of semiconductor light-emitting elements of the light-emitting portion are arranged on one end side of the substrate in a matrix; and

each of the plurality of the semiconductor light-emitting elements is covered and sealed with a sealing resin in which a phosphor is mixed.

8. The self-ballasted lamp according to claim 7, further comprising a second insulating member interposed between the screw and the light-emitting module, wherein:

the semiconductor light-emitting elements comprise a blue semiconductor light-emitting element emitting blue light;

the phosphor comprises a yellow phosphor excited by a part of the blue light of the semiconductor and radiating yellow light;

one light-emitting portion is formed in a center region of the one side of the substrate; and

one opening portion is formed in a center region of the second insulating member.

9. The self-ballasted lamp according to claim 1, wherein a plurality of a positioning projections are formed on a face of the base body.

10. The self-ballasted lamp according to claim 1, further comprising:

a second insulating member interposed between the screw and the light-emitting module;

a connector mounted on one end side of the substrate; and

a wiring from the lighting circuit connected to the connector;

wherein the second insulating member comprises a notch portion formed corresponding to a mounting position of the connector.

11. The self-ballasted lamp according to claim 1, wherein:

the lighting circuit is attached to the base body via a cover of resin;

a wiring hole is formed in one end side of the cover;

a connector is mounted on one end side of a substrate; and

a wiring from the lighting circuit is connected to connector and passes through the wiring hole.

12. The self-ballasted lamp according to claim 1, further comprising a second insulating member interposed between the screw and the light-emitting module, wherein:

the screw includes a screw head portion and a screw shaft portion;

the second insulating member comprises a recessed portion containing the screw head portion at one face side and a screw insertion portion in which the screw shaft portion is disposed;

a positioning projecting portion is formed on one end side of the substrate; and

the recessed portion, the screw insertion portions, and the positioning projecting portion are positioned coaxially with a screw attachment portion.

13. The light equipment comprising;

an equipment body; and

the self-ballasted lamp according to claim 1 attached to the equipment body.